Originally Posted by Savuti
Go with the Ackley Bob, if only because you'll never trim brass again.


This ^^^. I got a 257 AI about 30 years ago, and it's been my go to rifle for deer. Completely happy with it. But truth be told you probably only gain about 50-75 fps over the standard 257 when loaded to equal pressures. But I don't ever recall having to trim brass!